OCP Summit 2026: Powering AI with Open Innovations in Scale-Up, Scale-Out, and Scale-Across Networks

This post details Meta's latest advancements in open networking infrastructure for AI workloads, presented at the OCP Summit 2026. Key contributions include the introduction of the liquid-cooled IcePack network rack and IceCube 102.4T switch blades, designed for high power density and gigawatt-scale AI clusters. It also introduces Flattened Planar Fabric (FPF), a multiplane backend scale-out fabric that enhances GPU connectivity and resilience by distributing traffic across eight independent network planes. The post elaborates on Backend Aggregation (BAG) for petabit-scale inter-region connectivity, addressing distance constraints with FBOSS-based SRv6 regional backbones and adaptive routing. Furthermore, it highlights MetaRoCE, an open-source RDMA transport protocol for AI networks, and the co-leadership of the Open Switch Platform Architecture (OSPA) initiative to standardize switch platform layers. The post also discusses challenges and strategies for bridging on-prem data centers and public cloud environments, including a standardized performance validation framework and normalizing heterogeneous fabrics.